WHILE EMPLOYEES WSERE USING A 100 TON POEWR PACK TO PUSH THE RAM PINS OUT OF THE CLEVIS. WHILE DOING THIS, THE SOLID SAFT USED TO PUSH THE PIN OUT, THE SHAFT POPPED OUT OF PLACE ADN HIT EE IN THE UPPER RIGHT CHEST AREA AND LOWER RIGHT SHOULDER AREA. HIS CHEST AND SHOULDER ARE RED AND SCRATCHED.